Biosorption and Diffusion Modeling of Pb(II) by Malt Bagasse

Table 2

Regression analysis using factorial central composite design.

	Coefficient estimate	value
	74.27	0.000083
	27.88	0.000221
	4.94	0.006952
	−12.86	0.001468
	−5.62	0.007622
	4.93	0.013861

Polynomial model (), where is the constant coefficient, is the linear coefficient, is the quadratic coefficient, and is the two-factor interaction coefficient.